JPH1056836A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the avoidance of poor contact, etc., due to an influence of muddy water, etc., simplify a linking mechanism of a ground contact sensor with a control valve and eliminate the inaccuracy of control caused by rattling in the linking site. SOLUTION: This rice transplanter is equipped with a controlling means capable of performing the rolling driving of a working device attached to a mobile machine body based on sensor operations of a ground contact sensor 21 following a fluctuation in ground contact pressure thereof and thereby maintaining the ground posture of the working device constant. In this case, an operating member 31 of a valve 33 for the rolling control is directly and mechanically connected through flexible mechanisms 28, 29 and 30 for permitting the vertical operations of driving members 24 stood from the single ground contact sensor 21 to the driving members 24 so as to convert the rolling operations of the driving members 24 into operating movement of the operating member 31 and transmit the rolling operations to the valve 33 for the rolling control.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a seedling table, a planting claw, and the like. By rolling drive based on
The present invention relates to a rice transplanter provided with rolling control means for maintaining a constant attitude of the working device to the ground.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No.
SUMMARY OF THE INVENTION A gist of the invention is to provide a side float type ground sensor on both sides of a center float and detect an upward operation of the ground sensor due to a change in ground pressure. Is provided for each ground sensor, and the contact-type sensor is mounted on a bracket mounted on the upper surface of the ground sensor.

When the upward movement of one of the right and left contact sensors reaches a predetermined value, the contact sensor is activated to swing the right and left traveling wheels back and forth to perform the rolling operation of the traveling body. On the point.

[0004]

In this configuration,
Although the grounding sensors are arranged on the left and right sides to detect the amount of rolling of the traveling aircraft, there are differences in the basic performance of the left and right grounding sensors as sensors such as the weight and the position of the center of gravity, which affects sensor sensitivity. However, the activation timing of the rolling control may be different depending on the rolling direction of the traveling body.

In addition, since the contact type sensor having the electric contact is mounted on the float surface of the side float,
It was in a state where it was easy to induce a failure under the influence of mud surface such as muddy mud.

SUMMARY OF THE INVENTION It is an object of the present invention to improve a grounding sensor for detecting a rolling state of a traveling body, and to more reliably control the rolling operation of the traveling body to the left and right as compared with the conventional configuration. In addition, a linking mechanism between the grounding sensor and the rolling control valve is configured to be less affected by muddy water or the like.

[0007]

According to a feature of the present invention, an operating member of a rolling control valve and a driving member erected from a single grounding sensor that performs a rolling operation are provided. It is mechanically directly connected via a flexible mechanism that allows the drive member to move up and down in order to transmit it after being converted into operation movement. The operation and effect are as follows.

That is, when the grounding sensor performs a rolling operation due to a change in the grounding pressure, the driving member also integrally performs a rolling operation, and a displacement amount due to the rolling operation of the driving member is converted into an operation movement of the operating member (in this case, , The amount of vertical movement of the driving member is not transmitted to the operating member by the accommodation mechanism), and the rolling control valve is operated,
Perform rolling control.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a partially enlarged side view, FIG. 2 is a side view of a walking rice transplanter, and FIG. 3 is a plan view of the same, wherein (1) is an engine, (2) is a transmission case, and (3) is the transmission case. (2) a planting case connected to a transmission case (4) via a transmission case (4); (5) a bonnet covering the upper side of the rice transplanting machine constituted by the engine (1) and the cases (2), (3) and (4); (6) is a spare seedling mounting table provided on the rear upper surface of the hood (5), (7) is a steering handle connected to the planting case (3), and (8) is above the handle (7). A low-back high seedling mounting table which is slidably mounted to the left and right through the guide rails (9) and (10).
1) is a transverse feed shaft mounted on the planting case (3) to drive the seedling mounting table (8) transversely, and (12) is mounted on the planting case (3) via a planting arm (13). Planting claw for taking out and planting one seedling of seedling from the seedling mounting stand (8), (1
4) A pair of left and right paddy traveling wheels supported on the mission case (2) via a swing case (15) so as to be movable up and down, and (16) are the swing cases (15) and (15).
A hydraulic cylinder for pitching which is connected to right and left rods (17) and (17) to control access to left and right running wheels (14) and (14), and (18) is a hydraulic cylinder for the engine (1) and the transmission case (2). Front and rear links on the lower side (19) (20)
The front float (21) is suspended between the left and right running wheels (14) and (14) below the planting case (3) and the handle (7). .

As shown in FIGS. 1 and 4 to 6, a link (23) having a planting depth adjusting lever (22) connected thereto and a rolling sensor arm which is a rolling sensor for detecting the tilting of the rice transplanting machine in the left-right direction. (24) The rear and front sides of the rear float (21) are supported by (24). Further, a pitching sensor arm (25), which is a pitching sensor for detecting tilting of the rice transplanting machine in the front-back direction.
Is brought into contact with the upper surface of the front float (18), and a change in the planting depth and a pitching operation of the body are detected by a change in the distance between the front float (18) and the body.

[0011] A receiving cylinder (28) is suspended above the transmission case (4) via a bracket (26) and a rolling fulcrum shaft (27), and a rolling shaft rotatably inserted into the receiving cylinder (28). (29) Input link (3
0) (30) The base end is fixed, and the link (30) (30)
While the upper end of the rolling sensor arm (24) (24) is connected to the tip, a rolling arm (31) is erected on a vertical line connecting the fulcrum shaft (27) in the middle of the receiving cylinder (28). 31) When one end is connected to a rolling rod (32) and the other end is connected to a spool (33a) of a rolling hydraulic switching valve (33), and the left and right sensor arms (24) and (24) move up and down in substantially the same direction. The left and right input links (30) and (30) are oscillated about the rolling shaft (29) to maintain the hydraulic switching valve (33) neutral,
When the left and right sensor arms (24) and (24) move in different directions or when only one of the sensor arms (24) moves up and down, the rolling fulcrum shaft (27) is moved by the swing amount difference between the left and right links (30) and (30). Swing the receiving cylinder (28) to the center to move the spool (33a) forward and backward, and switch the switching valve (33).
Is switched.

Further, a receiving cylinder (35) is fixed to a body frame (34) on which the engine (1) is mounted, and the pitching sensor arm (2) is swingably mounted on the receiving cylinder (35).
The base end of 5) is inserted and supported, and the other end of the arm (25) is connected to a spool switching arm (39) of a pitching hydraulic switching valve (38) via a swing link (36) and a pitching link (37). The body and front float (1) that are connected to change the planting depth of the planting claw (12) due to unevenness of the tillage etc.
8) when the distance between the sensor arms changes (25)
Thus, this is detected and the switching valve (38) is switched.

The hydraulic switching valves (33) and (38)
The hydraulic cylinder for rolling (40) and the hydraulic cylinder for pitching (16) are operated and controlled by a piston rod (16a) of the hydraulic cylinder for pitching (16) attached to the body frame (34). 41) through the swing plate (42)
And both ends of the plate (42) are connected to the swing case (15) via left and right rods (17) and (17).
(15) and a piston rod (16a)
The hydraulic cylinder for rolling (40) and the piston rod (40) are interposed between a fixed mounting plate (43) mounted on the side and the swing plate (42) via a swing fulcrum shaft (44).
a), the swing plate (42) is slid in the front-rear direction under the control of the hydraulic cylinder (16) for pitching, so that the height of the right and left wheels (14) and (14) with respect to the machine body is made different at the same time. While the application depth is maintained substantially constant, the swing plate (42) is horizontally swung about the fulcrum shaft (41) by the control of the rolling hydraulic cylinder (40) so that the right and left rods (17) and (17) are different. By pushing and pulling in the direction, the support height of the left and right wheels (14) and (14) is made different to maintain the rice transplanting machine substantially horizontally in the left and right directions.

As apparent from the above description, the planting claw (12), which is a working device attached to the vehicle body frame (34), which is a traveling body, is connected to the rear float (21), which is a grounding sensor.
The rice transplanter provided with a hydraulic cylinder (40) as a rolling control means for maintaining a constant attitude of the planting claw (12) to the ground by performing a rolling drive based on a sensor operation associated with a variation in the ground pressure of the rice transplanter. A rolling arm (31), which is an operating member of a hydraulic switching valve (33), which is a rolling control valve, and a sensor arm (24), which is a driving member erected from a single rear float (21) that performs rolling operation. A receiving cylinder (28) and a rolling shaft, which are flexible mechanisms that allow the sensor arm (24) to move up and down so that the rolling operation of the sensor arm (24) is converted into the operation movement of the rolling arm (31) and transmitted. (29) and mechanically directly via the input link (30). Further, by employing a mechanical linkage mechanism for transmitting the mechanical displacement of the rear float (21) to the rolling hydraulic switching valve (33), it is not necessary to employ a means for electrically detecting as in the related art. Poor contact or the like due to the influence of muddy water or the like of the sensor can be avoided. Moreover, since the detection is performed by a single rear float (21) as the grounding sensor, it is not necessary to consider the difference in the sensor characteristics as compared with the conventional configuration in which the grounding sensors are arranged on the left and right to perform the detection. And since it is a single sensor, the linking mechanism with the rolling hydraulic switching valve (33) can be simplified, and
As the linkage mechanism, the sensor arm (24) erected from the rear float (21) is directly connected to the rolling arm (31) of the hydraulic switching valve (33), so that the linkage mechanism can be simplified, and It is configured so that the inaccuracy of control due to rattling can be eliminated, the rolling operation of the rear float (21) can be reliably transmitted to the hydraulic switching valve (33), and the rolling control can be made more reliable. .

The pitching sensor arm (2)
5) The lower pressure sensing part (25a) is in contact with the buoyancy center position (A) of the front float (18), and the vertical movement of the front float (18) is accurately detected by the sensor arm (25). The sensitivity is improved.

This embodiment is constructed as described above. During the rice transplanting operation, the depth of the planted rice field changes due to unevenness of the cultivator and the like. ) The whole thing goes up and down, comes in contact with the aircraft,
Sensor arm (25) interlocked with front float (18)
The operation of the pitching hydraulic cylinder (16) is controlled by the rocking motion of the pitching hydraulic cylinder (16), the traveling wheel (14) is moved in and out, and the aircraft is raised and lowered.
The planting depth is kept substantially constant, and the rolling hydraulic cylinder (40) is operated and controlled by swinging the rear float (21) left and right and up and down with respect to the aircraft when the aircraft is tilted left and right on a ridge or a slope. Left and right wheels (14)
(14) The rice transplanting machine is raised and lowered to a state in which the supporting heights are made different to keep the rice transplanting machine substantially horizontal, and the planting depth on the left and right sides is kept substantially constant.

The front and rear floats (18) (2)
1), the adjusting lever (2)
2) Even if the planting depth is changed, the effect on the pitching is small and the pitching performance can be stably maintained.

[0018]

As is apparent from the above embodiments, the present invention provides a working device (12) mounted on a traveling body (34).
A rice transplanter provided with rolling control means (40) for maintaining a constant attitude of the working device (12) to the ground by rolling-driving the working device (12) based on a sensor operation accompanying a variation in the ground pressure of the ground sensor (21). , An operating member (31) of a rolling control valve (33) and a driving member (24) erected from a single grounding sensor (21) that performs a rolling operation are operated by operating a rolling operation of the driving member (24). It is mechanically directly connected via a flexible mechanism (28) (29) (30) which allows the drive member (24) to move up and down in order to transmit the operation and movement of the member (31). By adopting a mechanical linkage mechanism for transmitting the mechanical displacement of the ground sensor (21) to the rolling control valve (33), it is not necessary to employ a means for electrically detecting as in the related art. It can be avoided contact failure due to the influence of mud or the like having the sensor. Moreover, the grounding sensor (2
Since the detection is performed by a single device as 1), there is no need to consider the difference in sensor characteristics as compared with the conventional configuration in which the grounding sensors (21) are disposed on the left and right to perform detection. Since it is one sensor, the linking mechanism with the rolling control valve (33) can be simplified, and the driving member (2) standing upright from the ground sensor (21) can be used as the linking mechanism.
4) By directly connecting the operation member (31) of the control valve (33), the linking mechanism can be simplified, the inaccuracy of the control due to rattling at the linking portion can be eliminated, and the grounding sensor (21) The rolling operation of the valve (3
3), and the rolling control can be made more reliable.

[Brief description of the drawings]

FIG. 1 is a partially enlarged side view.

FIG. 2 is an overall side view of the rice transplanter.

FIG. 3 is a plan view of the same.

FIG. 4 is a partially enlarged plan view.

FIG. 5 is an explanatory diagram of a pitching sensor unit.

FIG. 6 is an explanatory diagram of a rolling sensor unit.

[Explanation of symbols]

(12) Planting claw (working device) (21) Rear float (ground sensor) (24) Sensor arm (drive member) (28) Cylinder (flexible mechanism) (29) Rolling shaft (flexible mechanism) (30) Input Link (flexible mechanism) (31) Rolling arm (operating member) (33) Hydraulic switching valve (valve for rolling control) (34) Body frame (running body) (40) Hydraulic cylinder for rolling (rolling control means)

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Hiroyuki Takahashi 1-32 Chayacho, Kita-ku, Osaka Yanmar Agricultural Machinery Co., Ltd.

Claims (1)

[Claims] A rolling control means for maintaining a constant attitude of the working device to the ground by driving a working device attached to the traveling body based on a sensor operation associated with a change in ground pressure of a ground sensor. In a certain rice transplanter, an operating member of a rolling control valve and a driving member erected from a single ground sensor that performs a rolling operation are transmitted in order to convert the rolling operation of the driving member into an operation movement of the operating member and transmit the operation. A rice transplanter that is mechanically directly connected via a flexible mechanism that allows the drive member to move up and down.